package day04;

public class Demo01 {
    //Java当中的main或者主方法
    //运行代码
    public static void main(String[] args) {
        int a = 123;
        double b = 3.14;
        boolean c = true;
        boolean d = false;

        System.out.println(a);
        System.out.println(b);
        System.out.println(c);
        System.out.println(d);

    }

}
